My parent's laptop is slowly grinding to a halt and they are looking at buying something new. Does anybody know which of Dell's current laptop selection would offer full hardware support under Ubuntu 10.10? Any advice or guidance would be appreciated. Thanks!

If you don't have a specific reason for purchasing Dell, you might find that buying a laptop with Ubuntu on it already better: you are guaranteed that the laptop is supported then. Vendors such as http://zareason.com/shop/Laptops/ and http://www.system76.com/ sell laptops with Ubuntu on.

Dell's lineup of laptops which they sell with Ubuntu on them out of the box changes frequently, but http://dell.com/ubuntu lists a laptop, a netbook, and a desktop machine at the moment.